The Collage takes a long time to load.

Collages with large thumbnails or lightbox effects need to load a number of images. If you publish these images at fullquality settings then things will run slowly. By choosing a more compressed file type (like JPEG Medium Quality) you canimprove performance dramatically. The Output Format setting is in the RapidWeaver Page Info window under the Generaltab. This can be a good solution for improving the performance of any image-heavy page in RapidWeaver, not justCollage.